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Progress of Theoretical and Experimental Physics

Tensor network approach to two-dimensional Yang–Mills theories

Masafumi Fukuma, Daisuke Kadoh, Nobuyuki Matsumoto

Published Oct 26, 2021• 25 citations
Publisher

Abstract

Abstract We propose a novel tensor network representation for two-dimensional Yang–Mills theories with arbitrary compact gauge groups. In this method, tensor indices are given directly by group elements with no direct use of the character expansion. We apply the tensor renormalization group method to this tensor network for SU(2) and SU(3), and find that the free energy density and the energy density are accurately evaluated. We also show that the singular value decomposition of a tensor has a group-theoretic structure and can be associated with the character expansion.

DOI
10.1093/ptep/ptab143

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